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Process method for producing reduced iron from red mud
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A process method and technology for reducing iron, applied in furnaces, cooking furnaces, furnace types, etc., can solve the problem of high production cost, and achieve the effects of low cost, simple process flow, and wide range of materials.
Inactive Publication Date: 2013-12-11
JINAN IRON & STEEL GRP REFRACTORY CO LTD
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Problems solved by technology
[0002] At present, raw materials for reduced iron production mainly use iron orepowder, iron oxide scale or a mixture of the two, which is directly affected by the price of iron ore powder, so the production cost is high
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Embodiment 1
[0017] The red mud of the present embodiment makes the processing method of reduced iron, comprises the steps:
[0018] In the first step, 950kg of red mud and 50kg of graphite with an Fe content of 32% were mixed evenly with a high-speed mixer.
[0019] In the second step, use the elevator to transport the mixed red mud and accelerator to the forming platform, and then use the hydraulic vibration forming machine to make compacts. Each time the compacts are made, the vibration molding time of each compact is 5 seconds. Clean up the burrs on the surface of the compact, and if there are cracks, return it to the molding silo, and the density of the compact is ≥ 2.80g / cm 3 , compacts below this density are also returned to the forming silo;
[0020] The third step is to first spread a layer of 1-6cm thick reducing agent on the bottom of the reducing tank, install two compacts, fully fill with reducing agent, then install two compacts, and then fully fill with reducing agent. Two...
Embodiment 2
[0025] The red mud of the present embodiment makes the processing method of reduced iron, comprises the steps:
[0026] In the first step, 980kg of red mud and 20kg of graphite with a Fe content of 33.5% were mixed evenly with a high-speed mixer.
[0027] In the second step, the mixed red mud and accelerator are transported to the forming platform with a hoist, and then a compact is made with a hydraulic vibration molding machine. Each compact is made with a vibration molding time of 15 seconds. After forming, the Clean up the burrs on the surface of the compact, and if there are cracks, return it to the molding silo, and the density of the compact is ≥ 2.80g / cm 3 , compacts below this density are also returned to the forming silo;
[0028] The third step is to first spread a layer of 1-6cm thick reducing agent on the bottom of the reducing tank, install two compacts, fully fill with reducing agent, then install two compacts, and then fully fill with reducing agent. Two piec...
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Abstract
The invention discloses a process method for producing reduced iron from red mud. The process method comprises the following steps of: (1) uniformly mixing red mud with an accelerant according to parts by weight with a high-speed mixer; (2) producing green compact; (3) adding the green compact together with a reducing agent to a reducing tank; (4) placing the reducing tank in a kiln car, and sealing the reducing tank with a sealing cover; (5) firing the kiln car with a tunnel kiln at the firing temperature of 1000-1300 DEG C for 20-50h; and (6) taking out the fired finished product and carrying out surface cleaning. The process method has the beneficial effects that the raw materialred mud is residue from aluminum oxide production, and China is a main country for producing aluminum oxide, thus the raw material is wide in sources and low in cost, and the consumption of a great amount of red mud is beneficial to environmental protection; and the process flow is simple and the finished product has high iron content.
Description
technical field [0001] The invention relates to a process for making reduced iron from red mud. Background technique [0002] At present, raw materials for reducing iron production mainly use iron orepowder, iron oxide scale or a mixture of the two, which is directly affected by the price of iron orepowder, so the production cost is high. [0003] Red mud is a residue formed by impurities such as iron and titanium and most of the silicon in the ore when bauxite is leached by strong alkali in the alumina production process. Red mud contains a large amount of valuable metal elements, and the iron content is generally It is more than 30%, so the recovery of iron in red mud has important economic value. Contents of the invention [0004] The problem to be solved by the present invention is to provide a process for producing reduced iron from red mud with simple process flow and low production cost. [0005] In order to solve the above-mentioned technical problems, the proc...
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Application Information
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